Dual-Band Suspended-Plate Wearable Textile Antenna

Abstract

A novel, dual-band wearable textile antenna fabricated using conductive textiles for operation in both ISM and HiperLAN applications is presented. Its concept is based on the suspended plate antenna. It features a 60×45 mm 2 rectangular radiating element suspended over a 80×60 mm 2 ground plane using a 5 mm foam substrate. The proposed rectangular radiator is modified using slots, slits, and shorting posts to enable dual-band resonance and broad bandwidths in both frequency bands: 277 MHz (2.22 to 2.48 GHz) in the ISM and 850 MHz (4.95 to 5.80 GHz) in the HiperLAN band. The antenna radiates uni-directionally and the ground plane avoids coupling to the users' body. The SP-WTA shows a total efficiency between 67 % and 89 % and a peak gain of 8.33 dB.

Considerations on Embroidered Textile Antennas for Wearable Applications

“…Since direct soldering of conductive textile is impossible for most textile materials, the antenna feed should be attached, e.g., by conductive epoxy [6] or by using a small piece of copper tape (Fig. 7) to allow soldering [7].…”

“…The principal issues in use of conductive textiles in antennas are finite conductivity of such materials and relatively high price for widespread commercial use. Instead of using full conductive fabrics such as Nora, FlecTron [5], ShieldIt [6], etc., mixing conductive textile threads with conventional ones is proposed in [7] and [8] to reduce the cost of integration of antennas into clothes. In this letter, we further investigate conductive textiles and analyze the influence of conductive thread density to antenna properties.…”

Performance Evaluation of a Star-Shaped Patch Antenna on Polyimide Film Under Various Bending Conditions

“…In antenna design, the growth of wearable devices, which are not limited to on-body applications, increases the demand for the antenna to be fabricated on a flexible material. A number of flexible antennas have been realized on various flexible substrate materials such as textile [1,2], paper [3], and thin film [4,5]. Although it is suitable for wearable and conformal applications, fabric substrate is also prone to discontinuities, fluids absorption, and crumpling [6].…”

Meta‐surface enabled hepta‐band compact antenna for wearable applications

“…However, it is rare to see the two techniques unified to achieve multiband behaviour and improved radiation characteristics, particularly in the wearable scenario. A number of wearable antennas (with/without meta-surface backing) were designed in [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]; however, they are resonating only for single, dual, or triple narrow bands addressing either one or two wireless applications. In [22], the AMC ground was reported to achieve body SAR reduction.…”